MICRO 290 LAB MIDTERM EXAM QUESTIONS WELL ANSWERED LATEST 2025-2026
what is the purpose of a microscope ? - Answers magnification, contrast, and resolution
(increases size)
What microscope do we use in class? - Answers compound light microscope
How many lenses are in a compound microscope? - Answers 3
What are the lenses of a compound microscope? - Answers objective, ocular, and condenser
what refers to objectives that can be changed with minimal or no refocusing? - Answers
Parfocal
What does a dark field microscope look at? - Answers Pale objects
what microscope increases contrast and enables observation of more details? - Answers dark
field microscope
what is the best objective lense to view bacteria on a compound light microscope? - Answers
100X
What are the two different types of electron microscope? - Answers TEM (transmission electron
microscope) and SEM (scanning electron microscope)
Why does oil immersion lens increase resolution? - Answers light does not refract
Immersion oil should only be used with what magnification? - Answers 100X
What microscope does specimen appear light against dark background? - Answers Dark field
microscope
What microscope is used to examine living organisms or specimens that would be damaged or
altered by attaching them to slides or staining them? - Answers phase contrast light microscope
What microscope generate to be more electrons that ultimately produce an image on a
fluorescent screen? - Answers Transmission electron
What microscope looks at the inside of a cell? - Answers Transmission electron microscope
What microscope looks at the surface of a cell? - Answers Scanning electron microscope
How little does a scanning electron look at microbes? - Answers Nanometers
What is a agar plate made out of? - Answers Seaweed and broth
What is the solidifying point of solid agar? - Answers 42C
What is the melting point of solid agar? - Answers 100C
what is the purpose of a microscope ? - Answers magnification, contrast, and resolution
(increases size)
What microscope do we use in class? - Answers compound light microscope
How many lenses are in a compound microscope? - Answers 3
What are the lenses of a compound microscope? - Answers objective, ocular, and condenser
what refers to objectives that can be changed with minimal or no refocusing? - Answers
Parfocal
What does a dark field microscope look at? - Answers Pale objects
what microscope increases contrast and enables observation of more details? - Answers dark
field microscope
what is the best objective lense to view bacteria on a compound light microscope? - Answers
100X
What are the two different types of electron microscope? - Answers TEM (transmission electron
microscope) and SEM (scanning electron microscope)
Why does oil immersion lens increase resolution? - Answers light does not refract
Immersion oil should only be used with what magnification? - Answers 100X
What microscope does specimen appear light against dark background? - Answers Dark field
microscope
What microscope is used to examine living organisms or specimens that would be damaged or
altered by attaching them to slides or staining them? - Answers phase contrast light microscope
What microscope generate to be more electrons that ultimately produce an image on a
fluorescent screen? - Answers Transmission electron
What microscope looks at the inside of a cell? - Answers Transmission electron microscope
What microscope looks at the surface of a cell? - Answers Scanning electron microscope
How little does a scanning electron look at microbes? - Answers Nanometers
What is a agar plate made out of? - Answers Seaweed and broth
What is the solidifying point of solid agar? - Answers 42C
What is the melting point of solid agar? - Answers 100C
